Both the Roman Catholic and the Anglo Catholic (Anglican) church are Christian denominations. Spitting Protestant at Anglicans is an Irish obsession in my personal experience.
The word Protestant comes from the Edict of Nantes and people 'protesting' their faith. Hence the word protestant.
At university, a friend insisted that I went with her to mass, the 'new' English version after the RC's abandoned the tridentine Latin mass. It was word for word the same service as the first modern English Series 1, which in the Cof E was followed by 2 and then 3.
In fact, I wouldn't mind betting that the CofE, never slow to make a quick buck, hadn't 'recycled' all the old Series 1 service books with new covers and flogged them to the Roman Catholic church when they adopted the English mass.
In fact, I prefer the French mass to the, in my view, abortion that is Common Worship, as at least they've kept the 'thou' which has been completely removed from Cof E services. In addition, the Creeds - Apostle's and Nicene, now start "we believe" rather than the old "I believe" so are no longer a personal affirmation of faith.
I once spent a very uncomfortable 3 months temping in an office where a young lady called Bernadette, ranted at me about protestants very single bloody day. I had to bite my tongue in half not to ask her if she'd paid her Recusant money, and to tell her to ask her priest which pope was infallible when there was more than one. Some Middle Age schism or other - there used to be a papal palace in Avignon, for instance around the time of the plague.
Transubstantiation, is the doctrine that believes that the bread, or wafer, and wine at the Communion service is actually the real thing, not just a symbol.
Many years ago, as a Guide, at camp with 2 other companies run by the 2 daughters of my Guide captain, one of them was talking about Rushden, and said that when the local RC's wanted to go to a full High Mass all bells and smells etc they went to the local CofE it was so high church.
Apart from small pockets in remote areas, the main origin of Roman Catholics in the UK are of Irish origin, where the tradition is not to be allowed to read the Bible for themselves, but to believe 100% in the priest's interpretation of the scriptures as they are too stupid to do so for themselves. This is in contrast to the Jewish faith where it's expected that everyone will read the scriptures for themselves. At one time, convents wouldn't allow pupils to read the Old Testament, hopefully times have changed a little.
Interestingly, the highest placed Roman Catholic in the UK is the Duke of Norfolk, a dukedom created by Elizabeth I, who also decreed the Acts of Tolerance after the Reformation and its bloody aftermath. It's this Roman Catholic peer who has the responsibility, and privilege, of devising the form of the Coronation, although the service is from the Book of Common Prayer, of the monarch, who is, of course, the Supreme Governor of the Church of England. A rather funny and typically English tolerant way of doing things.
The authorised version of the bible is from before the Reformation, and was ordered by King James so that his subjects could read the texts in their own language. He commanded the translation to be completely faithful in rythmn and poetry as the original Latin and Hebrew the sound of which had comforted people for centuries. It still does - as a little girl, DD used to ask for the story of God in the garden, and never ever managed to keep her eyes open beyond the first chapter or so. The earliest prayer book is also from before the Reformation, although the Book of Common Prayer dates from 1662.
Sadly, in these days of religious extremism, it's these very acts of tolerance, enshrined in English/British law and culture, that have been the undoing, as many leaders of extremism are qualified in the law, and have used centuries old English law to suit their own ends.